Two frames out of phase with each other were combined using different colors. The result is that only the part of the speaker that moved between exposures are colored (other than the general yellow cast.
I really like what you did with this. Knowing what you started with is important for me to be able to understand how this is a simplification of what you started with. And for me, the result is better for the effort.
I did the nasty "Resize" on this shot to get it under the limit. Please upload a better version if you get the chance and you feel like it before the voting.
I'd like to know more about exactly how you accomplished this too. Jim H.